Lock and latch.



A. PHILLIPS.

LOOK AND LATCH.

Arrmoa'non rrnnnwe. 21, 1900.

Patented Jan. 31, 1911.

FIG. 2.

FIG.

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UNITED STATES PATENT OFFICE.

ALBERT PHILLIPS, OF LEYTON, ENGLAND, ASSIGNOR TO MARG'EWOOD LOCKS LIMITED, OF LONDON, ENGLAND.

LOCK AND LATCH.

Specification of Letters Patent.

Application filed August 21, 1909.

Patented Jan. 31, 1911.

Serial No. 513,998.

To all whom it may concern:

Be it known that I, ALBERT PHILLIPS, locksmith, subject of the King of England, residing at 70 Blyth road, Leyton, Essex, in England, formerly of 105 Borrett road, VValworth, London, have invented certain new and useful Improvements in Locks and Latches, of which the following is a specification.

This invention relates to locks and latches of the kind wherein a series of levers or tumblers is carried by and moves with the bolt, the present invention consisting in the combination with such a series of levers or tumblers of a single spring for operating them in the opposite direction to that in which they are moved by the key.

To enable the invention to be fully understood it will be described by reference to the accompanying drawings which show the invention applied to a double-handed cupboard lock wherein the tumblers are in the form of plates mounted in the bolt and adapted to slide in a direction at right angles to that in which the bolt travels.

In the drawings, Figure 1 is an elevation of the lock with the cover plate partly broken away. Figs. 2 and 3 are sections on the lines 2-2 and 33 respectively of Fig. 1, and Fig. 4. is an elevation of one of the tumbler plates detached.

The case of the lock is indicated at A and the cover plate at B.

O is the bolt, the ends-of which slide in the case A in the usual manner, and D is the pin or stump which is fixed into the case at one end, and which at the other end enters a hole in the cover plate. The stump 1) passes through a slot E in the bolt. In the construction illustrated by way of example four tumblers F are shown fitted into and adapted to slide in a recess F formed in the face of the bolt. The tumblers fill the recess which forms a guide so that the tumblers and the bolt form a practically solid structure which will offer great resistance to any attempt to push back the bolt. The tumbler plates are cut and gated, as may be seen by reference to Fig. 4:, to pass the stump D above mentioned.

G is a single spring which serves for all the tumbler plates and is carried on a pin H in an extension I of the bolt. One end of the spring is arranged to hear at K against a flange J on the extension I, while the other end bears at K upon the tumbler plates. The portions of the tumbler plates F upon which the end of the spring bears, as at K, are made so that when all the tumbler plates are in their locking position they will be flush with one another soas to afford a fiat bearing surface for the spring, and those portions of the tumblers upon which the bent portion of the spring bears are made so that when the tumblers are lifted to pass the stump they will also be flush to retain the tumblers in their proper relative positions when moved by the key relatively to the stump.

It will be obvious that a single spring in conjunction with several tumblers is also applicable in connection with locks wherein EH13 tumblers are pivotally mounted upon the What I claim as my invention and desire to secure by Letters Patent is In a lock the combination of a bolt having a recess, a series of tumbler plates movable in such recess by the action of the key, an extension I of the bolt, a flange J to such extension, a pin H attached to the extension, and a bent spring G carried by the in and having one end bearing against the f ange J and the other against the series of tumblers substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALBERT PHILLIPS.

Witnesses:

A. J. FRENCH, J. NODERAER. 

